IHSAN Al-SHEHBAZ, Ph.D., Curator and Head of the Department of Asian Botany, Missouri Botanical Garden; Systematics and phylogeny of the mustard family Brassicaceae (Cruciferae).E-mail: ihsan.al-shehbaz@mobot.org

PORTER P. LOWRY, Ph.D., Curator and Head of the Africa and Madagascar Department, Missouri Botanical Garden; Systematics of Araliaceae; flora and vegetation of Madagascar; flora and vegetation of New Caledonia. E-mail: Pete.Lowry@mobot.org

ROBERT MAGILL, Ph.D., Curator and Vice-President of Research, Missouri Botanical Garden; Bryophyte systematics, evolution and biogeography, with an emphasis on mosses of Africa. E-mail: bob.magill@mobot.org

DAVID B. ROBERTSON, Ph.D., Professor of Political Science, UM-St. Louis; American national politics and policy, political history, political economy, labor, and environmental policy. E-mail: daverobertson@umsl.edu